First 4 Questions were quite straight forward
Q5. proving v^2 = n^2 (a^2 - x^2) involved limits and d(v^2/2)dx which made it difficult to prove.
also the last part of the rates question was hard
Q6 projectile motion was easy. use the given data to prove T = R/((U+V)costheta)
and V = (1/Y - 1)U...
Prior chem and phys in year 11 is quite good, equivalent to North shore, But Prior's HSC subjects are taught the best! It cannot be compared to any other tutoring mental institution:)